A 20-channel magnetoencephalography system based on optically pumped magnetometers.

A 20-channel magnetoencephalography system based on optically pumped magnetometers.
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DOI:
10.1088/1361-6560/aa93d1
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发表时间:
2017-11-10
影响因子:
3.5
通讯作者:
Schwindt PDD
Schwindt PDD
中科院分区:
工程技术2区
文献类型:
--
作者:
Borna A;Carter TR;Goldberg JD;Colombo AP;Jau YY;Berry C;McKay J;Stephen J;Weisend M;Schwindt PDD

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我们描述了一个多通道脑磁图(MEG)系统,使用光泵磁力计(OPMs)来感测人脑的磁场。该系统包括一个符合人体头部的20个OPM通道的阵列,一个包含阵列和人体的人体大小的磁屏蔽,一个驱动OPM阵列的激光系统,以及各种控制和数据采集系统。我们进行了两个MEG实验:听觉诱发磁场(AEF)和体感诱发磁场(SEF),在三个健康的男性受试者,使用我们的OPM阵列和306通道Elekta-Neuromag超导量子干涉仪(SQUID)MEG系统。所描述的OPM阵列测量磁场的切向分量,而不是由大多数基于SQUID的MEG系统测量的径向分量。在这里,我们比较的结果的OPM和SQUID为基础的MEG系统的听觉和体感数据记录在同一个人的两个系统。
We describe a multichannel magnetoencephalography (MEG) system that uses optically pumped magnetometers (OPMs) to sense the magnetic fields of the human brain. The system consists of an array of 20 OPM channels conforming to the human subject’s head, a person-sized magnetic shield containing the array and the human subject, a laser system to drive the OPM array, and various control and data acquisitions systems. We conducted two MEG experiments: auditory evoked magnetic field (AEF) and somatosensory evoked magnetic field (SEF), on three healthy male subjects, using both our OPM array and a 306-channel Elekta-Neuromag superconducting quantum interference device (SQUID) MEG system. The described OPM array measures the tangential components of the magnetic field as opposed to the radial component measured by most SQUID-based MEG systems. Herein, we compare the results of the OPM- and SQUID-based MEG systems on the auditory and somatosensory data recorded in the same individuals on both systems.
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